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Is This Object Visible Tonight?
What This Calculator Tells You
Enter your location and an object's coordinates to find out if it will be visible tonight. The calculator shows when the object rises and sets, its maximum altitude, and when it's best positioned for observation.
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Sample Objects to Try
| Object | RA | Dec |
|---|---|---|
| Orion Nebula (M42) | 5h 35m 17s | -5° 23' 28" |
| Andromeda Galaxy (M31) | 0h 42m 44s | +41° 16' 9" |
| Ring Nebula (M57) | 18h 53m 35s | +33° 1' 45" |
| Omega Centauri | 13h 26m 46s | -47° 28' 37" |
Click a row to load its coordinates into the calculator.
Tips for Visibility
- Altitude >30° is best: Objects lower than this suffer from more atmospheric interference
- Meridian crossing is optimal: Wait for the object to cross the meridian for best viewing
- Check moon phase: A bright moon can wash out faint objects
- Account for twilight: Deep sky objects need full darkness; astronomical twilight ends when the sun is 18° below the horizon
Related Calculators
- Object Rise and Set Times - Detailed rise/set calculations
- Best Time to Observe Object - Optimal viewing times
- Maximum Altitude of Object - How high will it get?